Indian Society of Genetics & Plant Breeding

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Genetic architecture of yield and quality traits in wheat (Triticum aestivum L.)

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The aim of this study was to investigate gene effects and
genetic variability by generation mean analysis for some
yield and quality traits in three diverse crosses of wheat
(JW 3288 × HD 8864, MP 3269 x GW 173 andJW 3020 × GW
366). The parents P1 and P1 and F1, F2, BC1 and BC2
populations were grown in a randomized complete block
design with three replications during 2017-2018 crop
seasons. Both additive and non-additive gene effects were
involved in the expression of days to ear emergence, plant
height, days to maturity, number of grains per spike, grain
yield, flour recovery, husk content, protein content, lysine
content and amylose content. The epistatic interaction was
observed for all the ten traits in said crosses. In general,
magnitude of dominance effect (h) has a greater value than
additive effect (d) in all the traits. Digenic interaction
indicated complex nature of inheritance means non-additive
gene action. The improvement by selection in early
generation could be advisable.
 

Keywords: Gene action, epistatisis, generation mean analysis, six parameter model, yield and quality components, bread wheat

Info

Year: 2019
Volume: 79
Issue: 1
Article DOI: https://doi.org/10.31742/IJGPB.79.1.14
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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